US5348836AExpiredUtility

Silver halide photographic material

43
Assignee: AGFA GEVAERT NVPriority: May 13, 1992Filed: Apr 22, 1993Granted: Sep 20, 1994
Est. expiryMay 13, 2012(expired)· nominal 20-yr term from priority
Inventors:Ludo Van RompuyJean-Marie Dewanckele
G03C 8/06C07C 323/16C07C 323/22C07C 327/28C07D 333/72C07D 333/74G03C 1/09G03C 1/485G03C 2001/03517G03C 2001/03564G03C 2007/3032G03C 2200/38G03F 7/07Y10S430/156
43
PatentIndex Score
2
Cited by
6
References
32
Claims

Abstract

The present invention provides a photographic material comprising on a support photosensitive silver halide particles, and substantially light insensitive silver salt particles having a speed at least a factor 10 less under the same conditions of exposure and development of said photosensitive silver halide particles than said photosensitive silver halide particles and a releasing compound of formula (I) or (II) as specified in the claims capable of image-wise releasing sulphide or a sulphide under conditions for image-wise development of said photosensitive silver halide particles to silver. The present invention further provides a method for obtaining an image and a lithographic printing plate with said photographic material.

Claims

exact text as granted — not AI-modified
We claim: 
     
       1. A photographic material comprising on a support photosensitive silver halide particles, and substantially light insensitive silver salt particles having a speed at least a factor 10 less under the same conditions of exposure and development of said photosensitive silver halide particles than said photosensitive silver halide particles and a releasing compound of formula (I) or (II) capable of image-wise releasing a sulphide or sulphide under conditions for image-wise development of said photosensitive silver halide particles to silver: ##STR5## wherein CARRIER represents a carrier moiety that upon reaction with either the reduced or oxidized form of a developing agent or upon reaction with silver ions is capable of releasing under the conditions of development of said photosensitive silver halide the moiety -(TIME) n  -S-A, -S-A or sulphide, TIME represents a timing group which releases -S-A or sulphide subsequent to the release of -(TIME) n  -S-A from CARRIER, A represents an organic group that renders the bond between S and A readily splittable under the development conditions of said photosensitive silver halide and n represents 0 or 1. 
     
     
       2. A photographic material according to claim 1 wherein said substantially light insensitive silver salt particles are silver halide particles. 
     
     
       3. A photographic material according to claim 1 wherein said releasing compound corresponds to one of the following formulas (III) to (VI): ##STR6## wherein R 1 , R 2  each independently represents hydrogen or an alkyl containing 1 to 5 carbon atoms; Z represents the necessary atoms for completing an aromatic ring and that may be substituted with one or more substituents;   X represents --OR 3  with R 3  hydrogen or a hydrolizable group yielding hydroxy, --NHR 4  with R 4  an alkyl, aryl, aralkyl each of which may be substituted, --N═O or --NO 2  ;   Y represents independently from X represents one of the significances given for X or --NHSO 2  --R 4  ;   and A, TIME and n are as defined in claim 1.   
     
     
       4. A photographic material according to claim 1 wherein A is hydrogen, an acyl, para-hydroxy benzyl, ortho-hydroxy benzyl each of which may be substituted, --CH 2  --NHCOR, --CH 2  --O--COR with R a hydrogen, alkyl, aryl or aralkyl each of which may be substituted. 
     
     
       5. A photographic material according to claim 1 wherein said photosensitive silver halide particles and said substantially light insensitive silver salt particles are present in the same layer. 
     
     
       6. A photographic material according to claim 1 further comprising a silver halide solvent or silver halide solvent precursor. 
     
     
       7. A photographic material according to claim 6 wherein said silver halide solvent is a cyclic imide, a 2-mercaptobenzoic acid, an alkanolamine or a mixture thereof. 
     
     
       8. A photographic material according to claim 1 additionally comprising a layer of physical development nuclei. 
     
     
       9. A method for obtaining an image comprising the steps of: information-wise exposing a photographic material comprising on a support photosensitive silver halide particles, and substantially light insensitive silver salt particles having a speed at least a factor 10 less under the same conditions of exposure and development of said photosensitive silver halide particles than said photosensitive silver halide particles and a releasing compound of formula (I) or (II) capable of image-wise releasing a sulphide or sulphide under conditions for image-wise development of said photosensitive silver halide particles to silver: ##STR7## wherein CARRIER represents a carrier moiety that upon reaction with either the reduced or oxidized form of a developing agent or upon reaction with silver ions is capable of releasing under the conditions of development of said photosensitive silver halide the moiety -(TIME) n  -S-A, -S-A or sulphide, TIME represents a timing group which releases -S-A or sulphide subsequent to the release of -(TIME) n  -S-A from CARRIER, A represents an organic group that renders the bond between S and A readily splittable under the development conditions of said photosensitive silver halide and n represents 0 or 1,   developing said information-wise exposed photographic material in an alkaline processing solution in the presence of (a) developing agent(s).   
     
     
       10. A method according to claim 9 wherein said substantially light insensitive silver salt particles are silver halide particles. 
     
     
       11. A method according to claim 9, wherein said releasing compound corresponds to one of the following formulas (III) to (VI): ##STR8## wherein R 1  R 2  each independently represents hydrogen or an alkyl containing 1 to 5 carbon atoms; Z represents the necessary atoms for completing an aromatic ring and that may be substituted with one or more substituents;   X represents --OR 3  with R 3  hydrogen or a hydrolizable group yielding hydroxy, --NHR 4  with R 4  an alkyl, aryl, aralkyl each of which may be substituted, --N═O or --NO 2  ;   Y represents independently from X represents one of the significances given for X or --NHSO 2  --R 4  ;   and A, TIME and n are as defined in claim 9.   
     
     
       12. A method according to claim 9 wherein said developing is carried out in the presence of a silver halide solvent. 
     
     
       13. A method according to claim 12 wherein said silver halide solvent is a thiocyanate, a thiosulphate, a cyclic imide, a 2-mercaptobenzoic acid, an alkanolamine or a mixture thereof. 
     
     
       14. A method for obtaining an image according to the DTR-process comprising the steps of: information-wise exposing a photographic material comprising on a support photosensitive silver halide particles, and substantially light insensitive silver salt particles having a speed at least a factor 10 less under the same conditions of exposure and development of said photosensitive silver halide particles than said photosensitive silver halide particles and a releasing compound of formula (I) or (II) capable of image-wise releasing a sulphide or sulphide under conditions for image-wise development of said photosensitive silver halide particles to silver: ##STR9## wherein CARRIER represents a carrier moiety that upon reaction with either the reduced or oxidized form of a developing agent or upon reaction with silver ions is capable of releasing under the conditions of development of said photosensitive silver halide the moiety -(TIME) n  -S-A, -S-A or sulphide, TIME represents a timing group which releases -S-A or sulphide subsequent to the release of -(TIME) n  -S-A from CARRIER, A represents an organic group that renders the bond between S and A readily splittable under the development conditions of said photosensitive silver halide and n represents 0 or 1,   contacting said information-wise exposed photographic material with an image-receiving material comprising on a support a layer containing physical development nuclei,   developing said information-wise exposed photographic material whilst in contact with said image-receiving material in an alkaline processing solution in the presence of (a) developing agent(s) and (a) silver halide solvent(s), separating said image-receiving material from said photographic material.   
     
     
       15. A method according to claim 14 wherein said substantially light insensitive silver salt particles are silver halide particles. 
     
     
       16. A method according to claim 14 wherein said releasing compound corresponds to one of the following formulas (III) to (VI): ##STR10## wherein R 1 , R 2  each independently represents hydrogen or an alkyl containing 1 to 5 carbon atoms; Z represents the necessary atoms for completing an aromatic ring and that may be substituted with one or more substituents;   X represents --OR 3  with R 3  hydrogen or a hydrolizable group yielding hydroxy, --NHR 4  with R 4  an alkyl, aryl, aralkyl each of which may be substituted, --N═O or --NO 2  ;   Y represents independently from X represents one of the significances given for X or --NHSO 2  --R 4  ;   and A, TIME and n are as defined in claim 14.   
     
     
       17. A method for obtaining an image according to the DTR-process comprising the steps of: information-wise exposing a photographic material comprising on a support (i) photosensitive silver halide particles, (ii) substantially light insensitive silver salt particles having a speed at least a factor 10 less under the same conditions of exposure and development of said photosensitive silver halide particles than said photosensitive silver halide particles, (iii) an image receiving layer containing physical development nuclei and (iv) a releasing compound of formula (I) or (II) capable of image-wise releasing a sulphide or sulphide under conditions for image-wise development of said photosensitive silver halide particles to silver: ##STR11##  wherein CARRIER represents a carrier moiety that upon reaction with either the reduced or oxidized form of a developing agent or upon reaction with silver ions is capable of releasing under the conditions of development of said photosensitive silver halide the moiety -(TIME) n  -S-A, -S-A or sulphide, TIME represents a timing group which releases -S-A or sulphide subsequent to the release of -(TIME) n  -S-A from CARRIER, A represents an organic group that renders the bond between S and A readily splittable under the development conditions of said photosensitive silver halide and n represents 0 or 1,   and developing said information-wise exposed photographic material in an alkaline processing solution in the presence of (a) developing agent(s) and (a) silver halide solvent(s).   
     
     
       18. A method for preparing a lithographic printing plate according to the DTR-process comprising the steps of: information-wise exposing a photographic material comprising on a support photosensitive silver halide particles, and substantially light insensitive silver salt particles having a speed at least a factor 10 less under the same conditions of exposure and development of said photosensitive silver halide particles than said photosensitive silver halide particles and a releasing compound of formula (I) or (II) capable of image-wise releasing a sulphide or sulphide under conditions for image-wise development of said photosensitive silver halide particles to silver: ##STR12##  wherein CARRIER represents a carrier moiety that upon reaction with either the reduced or oxidized form of a developing agent or upon reaction with silver ions is capable of releasing under the conditions of development of said photosensitive silver halide the moiety -(TIME) n  -S-A, -S-A or sulphide, TIME represents a timing group which releases -S-A or sulphide subsequent to the release of -(TIME) n  -S-A from CARRIER, A represents an organic group that renders the bond between S and A readily splittable under the development conditions of said photosensitive silver halide and n represents 0 or 1,   contacting said information-wise exposed photographic material with an image-receiving material comprising on a support a layer containing physical development nuclei and having a hydrophilic surface,   developing said information-wise exposed photographic material whilst in contact with said image-receiving material in an alkaline processing solution in the presence of (a) developing agent(s) and (a) silver halide solvent(s),   separating said image-receiving material from said photographic material.   
     
     
       19. A method according to claim 18 wherein said substantially light insensitive silver salt particles are silver halide particles. 
     
     
       20. A method according to claim 18 wherein said releasing compound corresponds to one of the following formulas (III) to (VI): ##STR13## wherein R 1 , R 2  each independently represents hydrogen or an alkyl containing 1 to 5 carbon atoms; Z represents the necessary atoms for completing an aromatic ring and that may be substituted with one or more substituents;   X represents --OR 3  with R 3  hydrogen or a hydrolizable group yielding hydroxy, --NHR 4  with R 4  an alkyl, aryl, aralkyl each of which may be substituted, --N═O or --NO 2  ;   Y represents independently from X represents one of the significances given for X or --NHSO 2  --R 4  ;   and A, TIME and n are as defined in claim 18.   
     
     
       21. A method for preparing a lithographic printing plate according to the DTR-process comprising the steps of: information-wise exposing a lithographic printing plate precursor comprising on a support (i) a photosensitive silver halide, (ii) a substantially light insensitive silver salt having a speed at least a factor 10 less than said photosensitive silver halide particles under the same conditions of exposure and development of said photosensitive silver halide particles and (iii) a releasing compound as defined in any of claims 1, 3 or 4 capable of image-wise releasing under the conditions for image-wise development of said photosensitive silver halide to silver a sulphide and (iv) a layer of physical development nuclei as an outermost layer on the photosensitive side of said support,   and developing said information-wise exposed photographic material in an alkaline processing solution in the presence of (a) developing agent(s) and (a) silver halide solvent(s).   
     
     
       22. A method for preparing a lithographic printing plate according to claim 21 wherein the support of said photographic material is paper or a polyester film support. 
     
     
       23. A method for preparing a lithographic printing plate according to the DTR-process comprising the steps of: information-wise exposing a lithographic printing plate precursor comprising on a hydrophilic support provided with an image receiving surface or image receiving layer containing physical developement nuclei (i) a photosensitive silver halide, (ii) a substantially light insensitive silver salt having a speed at least a factor 10 less than said photosensitive silver halide particles under the same conditions of exposure and development of said photosensitive silver halide particles and (iii) a releasing compound as defined in any of claims 1, 3 or 4 capable of image-wise releasing under the conditions for image-wise development of said photosensitive silver halide to silver sulphide,   developing said information-wise exposed photographic material in an alkaline processing solution in the presence of (a) developing agent(s) and (a) silver halide solvent(s) to obtain a silver image on said image receiving surface or in said image receiving layer,   and removing all layers above said silver image to expose said silver image by means of rinsing with water.   
     
     
       24. A method according to claim 23 wherein said hydrophilic support is an aluminium support. 
     
     
       25. A photographic material according to claim 3 wherein said aromatic ring is a benzene ring. 
     
     
       26. A photographic material according to claim 3 wherein said aromatic ring is a naphthalene ring. 
     
     
       27. A photographic material according to claim 11 wherein said aromatic ring is a benzene ring. 
     
     
       28. A photographic material according to claim 11 wherein said aromatic ring is a naphthalene ring. 
     
     
       29. A photographic material according to claim 16 wherein said aromatic ring is a benzene ring. 
     
     
       30. A photographic material according to claim 16 wherein said aromatic ring is a naphthalene ring. 
     
     
       31. A photographic material according to claim 20 wherein said aromatic ring is a benzene ring. 
     
     
       32. A photographic material according to claim 20 wherein said aromatic ring is a naphthalene ring.

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